John Piper is founder and teacher of desiringGod.org and chancellor of Bethlehem College & Seminary. For 33 years, he served as pastor of Bethlehem Baptist Church, Minneapolis, Minnesota. He is author of more than 50 books, including Desiring God: Meditations of a Christian Hedonist and most recently Come, Lord Jesus.

Larry Crabb is a Christian counselor, Bible teacher, and the founder and director of New Way Ministries.

Sam Storms is lead pastor for preaching and vision at Bridgeway Church in Oklahoma City, Oklahoma. He is the author of Practicing the Power: Welcoming the Gifts of the Holy Spirit in Your Life.